A Wisdom (Medicine) check lets you try to stabilize a dying companion or diagnose an illness. The only other mentions of Medicine can be found in the combat rules for Stabilizing a creature (PHB, p. 197).

Can anyone use a healers kit?

Jeremy Crawford on Twitter: “A healer’s kit can be used by someone without proficiency in Medicine.

Can you stabilize without healers kit?

Yes, you can make a Medicine check without any equipment. A healer’s kit allows you to stabilise without making the skill check (PHB, p.

Would you let a familiar perform a Medicine check to stabilize a downed ally? So familiars can make skill checks, as well as offer the Help action for skill checks with which they would logically be able to assist in performing.